package com.yang.commonutils.mybatis;


import java.text.DateFormat;
import java.util.*;

import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.omg.PortableInterceptor.SYSTEM_EXCEPTION;
import org.springframework.stereotype.Component;

/**
 * @author yds
 * @program edu
 * @description 作为mybatis sql自定义插件 参数补全和sql执行时间
 * @create 2020-12-11 09:00
 **/
/**

 * Sql执行时间记录拦截器

 */

@Intercepts({
        @Signature(type = Executor.class, method = "update", args = { MappedStatement.class, Object.class }),
        @Signature(type = Executor.class, method = "query", args = { MappedStatement.class, Object.class,
                RowBounds.class, ResultHandler.class }) })
@Component
public class SqlCostInterceptor implements Interceptor {

        public Object intercept(Invocation invocation) throws Throwable {
            MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
            Object parameter = null;
            if (invocation.getArgs().length > 1) {
                parameter = invocation.getArgs()[1];
            }
            String sqlId = mappedStatement.getId();
            BoundSql boundSql = mappedStatement.getBoundSql(parameter);
            Configuration configuration = mappedStatement.getConfiguration();
            Object returnValue = null;
            long start = System.currentTimeMillis();
            returnValue = invocation.proceed();
            long end = System.currentTimeMillis();
            long time = (end - start);
            if (time > 1) {
                String sql = getSql(configuration, boundSql, sqlId, time);
                System.out.println(sql);
            }
            return returnValue;
        }

        public static String getSql(Configuration configuration, BoundSql boundSql, String sqlId, long time) {
            String sql = showSql(configuration, boundSql);
            StringBuilder str = new StringBuilder(100);
            str.append("method ==> "+sqlId);
            str.append("\n");
            str.append("sql ==> ");
            str.append("["+sql+"]");
            str.append("\n");
            str.append("times:");
            str.append(time);
            str.append("ms");
            return str.toString();
        }

        private static String getParameterValue(Object obj) {
            String value = null;
            if (obj instanceof String) {
                value = "'" + obj.toString() + "'";
            } else if (obj instanceof Date) {
                DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT, Locale.CHINA);
                value = "'" + formatter.format(new Date()) + "'";
            } else {
                if (obj != null) {
                    value = obj.toString();
                } else {
                    value = "";
                }

            }
            return value;
        }

        public static String showSql(Configuration configuration, BoundSql boundSql) {
            Object parameterObject = boundSql.getParameterObject();
            List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
            String sql = boundSql.getSql().replaceAll("[\\s]+", " ");
            if (parameterMappings.size() > 0 && parameterObject != null) {
                TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
                if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
                    sql = sql.replaceFirst("\\?", getParameterValue(parameterObject));

                } else {
                    MetaObject metaObject = configuration.newMetaObject(parameterObject);
                    for (ParameterMapping parameterMapping : parameterMappings) {
                        String propertyName = parameterMapping.getProperty();
                        if (metaObject.hasGetter(propertyName)) {
                            Object obj = metaObject.getValue(propertyName);
                            sql = sql.replaceFirst("\\?", getParameterValue(obj));
                        } else if (boundSql.hasAdditionalParameter(propertyName)) {
                            Object obj = boundSql.getAdditionalParameter(propertyName);
                            sql = sql.replaceFirst("\\?", getParameterValue(obj));
                        }  else{
                            Map map = (Map)metaObject ;
                            sql = sql.replaceFirst("\\?", getParameterValue(map.get(propertyName)));
                        }
                    }
                }
            }
            return sql;
        }

        public Object plugin(Object target) {
            return Plugin.wrap(target, this);
        }

        public void setProperties(Properties properties) {
        }
}


